 |
Municipal wastewater
Household waste and waste from small industries is transported using water in long drainage pipes to treatment plants where particles, organic materials and nutrients are removed. The water may be septic due to the low Oxygen content, and the formation of Hydrogen Sulphide (H2S) causes problems. Hydrogen Sulphide smells like rotten eggs, and as well as representing a significant health risk, the gas can also cause corrosion and damage to the pipe system and reduce the efficiency of the treatment process. Hydrogen Sulphide is a gas which has a very low odour threshold. Even in small concentrations Hydrogen Sulphide can be smelt in a wide radius from manholes, air valves, pumping stations and treatment plants. Hydrogen Sulphide is also toxic, about as toxic as Hydrogen Cyanide, in high concentrations it is deadly. Hydrogen Sulphide will form in septic wastewater and even with stringent safety rules, it is impossible to guarantee that people will not be exposed to this gas. Efforts should, therefore, be made to prevent it being formed. When an underground sewage pipe breaks down, it is easy to conclude that it has suffered too great a mechanical strain. In fact, the pipe may have failed because it has been seriously corroded by Hydrogen Sulphide. Corrosion will gradually reduce the mechanical strength of the pipe until it can no longer tolerate design loads and collapses. We can supply Nutriox® which is used in wastewater and sludge to prevent the formation of Hydrogen Sulphide, and which also removes any H2S that has already been formed.
|
||||||
|
|
